Connection Diagram Of 3 Way Switch. Regardless of what 3 way switch wiring diagram you re following you ll need to use a 3 wire cable to connect the two 3 way light switches. Three way switches can be wired in a number of different ways depending on where they are located relative to the light fixture in the circuit cable runs.
This is the 3 wire cable which you must have to wire a 3 way. A three way switch is fundamentally different in its operation from a regular two way switch. The basic 3 way switch wiring diagram this is the most common and the easiest wiring diagram to follow of any of the wiring diagrams for a 3 way switch circuit.
A 3 wire nm connects the traveler terminals of the first and second 3 way switch together.
For example they can be arranged so that the feed cable runs to the first three way switch then to the light fixture box then to the second three way switch. The white wire of the cable going to the switch is attached to the black line in the fixture box using a wire nut. The black line wire connects to the common terminal of the first 3 way switch. You must completely forget about the notion of a switch being a simple open closed circuit and look at the diagram of the circuitry of this modern alternative.
